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163977-20-6

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163977-20-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 163977-20-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,3,9,7 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 163977-20:
(8*1)+(7*6)+(6*3)+(5*9)+(4*7)+(3*7)+(2*2)+(1*0)=166
166 % 10 = 6
So 163977-20-6 is a valid CAS Registry Number.

163977-20-6Relevant articles and documents

Intrinsic Reactivities of Some Carbanions in ?-Adduct Forming Reactions

Crampton, Michael R.,Stevens, Andrew J.

, p. 1715 - 1720 (2007/10/02)

Kinetic and equilibrium data are reported for nucleophilic attack in methanol at unsubstituted ringpositions of 1,3,5-trinitrobenzene, 2,4,6-trinitrotoluene and 1-chloro-2,4,6-trinitrobenzene by carbanions derived from dimethyl malonate, ethyl cyanoacetate and 4-nitro-, 4-cyano- and 2-cyanobenzyl cyanides.The results are used to determine intrinsic reactivities for the carbanions in these ?-adduct forming reactions and are discussed in terms of the electronic and solvent reorganisation occurring during reaction.

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